OsmAnd (http://osmand.net/ http://osmand.net/) downloads OpenStreetMap data to your phone for offline navigation on Android (there is also an iOS version that h

OsmAnd (http://osmand.net/ http://osmand.net/) downloads OpenStreetMap data to your phone for offline navigation on Android (there is also an iOS version that has maps but not driving directions yet). IMO the OsmAnd navigation UI is better than Google Maps, the search far worse.